I'm sorry, I incorrectly assumed an L-16 was an industrial material lift. If you're going to rig actual 12"
truss, use Genie Super Towers, or a similar material lift. I actually use Sumner material lifts (2100 series) which a lot of RnR companies use in replacement of the genie supertowers.
The most important thing when considering maximum span of
truss is the characteristics of said
truss, not the lifts. However, that would only be if you were using industrial material lifts. Those L-16s are more like DJ crank lifts and I wouldn't use those to lift up 12" box
truss. They look cheap to me. Also there are a few things to be aware of when using material lifts in entertainment applications....some riggers don't like them, you can be outside spec on the lifts when using them in this capacity, how to
call multiple lifts up at the same time,
etc.
I have a tour going up to Toronto in a few weeks (first weekend in October) and if you want you can stop by and see some Sumner 2124's in action with 12"
truss, plus talk to the guys on-site who use them all the time. Like I said, there are some quirky things with material lifts it doesn't hurt to know some tricks ahead of time.